© PCE Instruments
9
3.5
AC Current (Frequency, Duty Cycle) Measurements
Do not make 20A current measurements for longer than 30 seconds.
Exceeding 30 seconds may cause damage to the meter and/or the test leads.
• Insert the black test lead banana plug into the negative COM
jack.
• For current measurements up to 5000μA AC, set the function
switch to the yellow μA position and insert the red test lead
banana plug into the μA/mA jack.
• For current measurements up to 500mA AC, set the function
switch to the yellow mA position and insert the red test lead
banana plug into the μA/mA jack.
• For current measurements up to 20A AC, set the function
switch to the yellow 10A/HZ/% position and insert the red test
lead banana plug into the 10A jack.
• Press the MODE button to indicate “AC” on the display.
• Remove power from the circuit under test, then open up the
circuit at the point where you wish to measure current.
• Touch the black test probe tip to the neutral side of the circuit.
Touch the red test probe tip to the “hot” side of the circuit.
• Apply power to the circuit.
• Read the current in the display. In the 10A AC range, the right
auxiliary displays frequency.
• Press and hold the MODE button to indicate “Hz”.
• Read the frequency in the display.
• Momentarily press the MODE button again to indicate “%”.
• Read the % duty cycle in the display.
• Press and hold the MODE button to return to current
measurement.
• Press EXIT for 2 seconds into the function of AC+DC. Test
DC and AC TRUE Rms.
• When uAac>2mA, mAac>2mA, 10Aac >0.2A, the current
frequency can be read synchronously in the right auxiliary
display.
Summary of Contents for PCE-ITM 20
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